I am currently studying FOC for BLDCM.A motor with magnetic encoder AS5048A was used.The PWM output of the magnetic encoder works normally, but I failed to get the SPI interface to work normally.If you have ever used this magnetic encoder, please give me some advice.
Here is my spi configuration，my project and the data from the logic analyzer.
void SPI_Config()
{
SPI_InitTypeDef spi;
GPIO_InitTypeDef gpio;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
gpio.GPIO_Pin = SPI_SCK_PIN|SPI_MISO_PIN|SPI_MOSI_PIN;
gpio.GPIO_Speed = GPIO_Low_Speed;
gpio.GPIO_Mode = GPIO_Mode_AF;
gpio.GPIO_OType = GPIO_OType_PP;
gpio.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(SPI_GPIO_PORT, &gpio);
GPIO_PinAFConfig(SPI_GPIO_PORT,SPI_SCK_PINSOURCE,GPIO_AF_SPI2);
GPIO_PinAFConfig(SPI_GPIO_PORT,SPI_MISO_PINSOURCE,GPIO_AF_SPI2);
GPIO_PinAFConfig(SPI_GPIO_PORT,SPI_MOSI_PINSOURCE,GPIO_AF_SPI2);
gpio.GPIO_Pin = ICGCSB_PIN;
gpio.GPIO_Mode = GPIO_Mode_OUT;
gpio.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(ICGCSB_PORT, &gpio);
GPIO_SetBits(ICGCSB_PORT,ICGCSB_PIN);
spi.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
spi.SPI_Mode = SPI_Mode_Master;
spi.SPI_DataSize = SPI_DataSize_16b;
spi.SPI_CPOL = SPI_CPOL_Low;
spi.SPI_CPHA = SPI_CPHA_2Edge;
spi.SPI_NSS = SPI_NSS_Soft;//软件NSS SPI_NSS_Soft SPI_NSS_Hard
spi.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;//fSCK = 42MHz/SPI_BaudRatePrescaler
spi.SPI_FirstBit = SPI_FirstBit_MSB;
spi.SPI_CRCPolynomial = 15;
SPI_Init(SPI2, &spi);
SPI_Cmd(SPI2, ENABLE);
delay_ms(10);
}
